Pot type oil burner



April 26, 1949. H. c. BArrY 2,468,156

` POT TYPE OIL BURNER Filed Aug. 2.1. 1945 INVENT OR.

.Holhr' C. Mii* l BY l f f I f Patented Apr. 26, 1949 POT TYPE OILBURNER Howard C. Baity, Detroit, Mich., assignor to Michigan Tank &Furnace Corporation, Detroit, Mich., a corporation of MichiganApplication August 21, i945, sel-1am. 611,817

1 claim. (cl. 15s-91) The invention relates to oil burner apparatus ofthe vaporizng pot burner type.

The invention has for one of its objects to provide an improved burnerwhich is so constructed that it produces a clean, uniform llame.

The invention has for another object to provide an improve'd burnerwhich Vis so constructed that in the event that the oil orvoil vapor isignited when the burner is flooded, puffing or kicking back of theburner is avoided.

The invention has for a further object to provide an improved burnerwhich is so constructed that the flame is directed radially inwardly andtoward the center of the burner at its top.

With these and other objects in view, the invention resides in the novelfeatures of construction and combinations and arrangements of parts asmore fully hereinafter set forth.

In the drawings- Figure 1 is a side elevation, partly in section, of aportion of an oil burner apparatus having a burner embodying theinvention;

Figure 2 is a cross section on the line 2-2 of Figure l.

The oil burner apparatus, which is partly illustrated in the presentinstance, is a hot water heater in which the tank I has the innercylindrical tube 2 which forms the combustion chamber. 3 is the burnerwhich comprises a sheet metal shell having the sidewall 4 and integralbottom wall 5 and top wall 6 preferably in the nature of a castingresting upon the upper end of the side wall 4. 'I'he top wall has thedownwardly eX- tending annular ange 1 sleeved within the side wall 4 andthe upwardly extending annular flange 8 sleeved within the tube 2. Thetop wall is provided with the central opening 9 for placing the spaceinside the burner in communicationwith the combustion chamber formed bythe tube. I and II are sheet metal bailles spaced from each other andthe bottom and top walls of the burner, the baille I 0 having thecentral opening I2 and the baille II having the central opening I8 ofappreciably greater diameter than the opening I2. The side wall 4 isprovided with the annular series of primary air inlet openings I4 belowthe lower baille I0 and also with the annular series of primary airinlet openings I and I6 above the lower baille I Il, the openings I6being below and adja- 1 cent to the upper baffle II. The side wall 4 isalso provided with the annular series of secondary air inlet openings I1above the upper bafe I I.

'I'he burner is also provided with the wall I8 which may be formedintegral with or separately 2 from the upper baille II. As illustratedin the present instance, it is formed separately and xedly secured tothe upper baflle as by being welded thereto. More in detail, the wall I8has the cylindrical portion I9 which is sleeved within and welded to thecylindrical portion 20 of the upper baille. The wall I8 also has thetapering portion 2l which extends upwardly and radially inwardly of theburner from the cylindrical portion I9 and the cylindrical portion 22which extends upwardly from the taperingl portion 2| and abuts the topwall 6. The wall I8 therefore'cooperates with the side wall l and thetop wall 6 to form an air chamber communicating with the air outside theburner through the openings I1. The wall 22 is formed with the annularseries of openings 23 which are preferably of the same size as theopenings I1 and which are spaced a substantial distance below the upperedge of the cylindrical portion 22.

The sizes of the primary and secondary air inlet openings are such thatthe oil which enters the burner through the oil inlet 24 vaporizes andrises through the central openings I 2- and I 8 of the baiiles andilnally mixes with the secondary air above the battles to produce aclean, eflicient llame, the secondary air being suflicient to assurecomplete'combustion. The llame starts immediately adjacent thecylindrical portion 22 and projects radially inwardly therefrom.

For the purpose of avoiding kicking or puillng back in the event thatthe oil in the burner is ignited when the burner is flooded, the topwall 6'is formed with the annular extension 25 radially inwardly beyondthe cylindrical portion 22 and terminating in the depending annulariiange 26, the lower edge of which is preferably substantially in linewith the uppermost edge portions oi' the openings 23. The annularextension and depending flange also serve to direct the flame radiallyinwardly from the cylindrical portion 22 to the opening 9 bounded by thedepending iiange, after which the llame rises, the arrangement beingsuch that direct contact of the llame with tle inner tube 2 iseliminated thereby avoiding direct burning of this tube.

What I claim as my invention is:

A pot type oil burner having a cylindrical side Wall, a circular bottomwall, an annular top wall, annular upper and lower baiiles spaced fromeach other and said bottom and top walls and having central openingstherethrough, and an inner wall above said upper baille inside said sidewall and cooperating with said side wall and top wall to REFERENCES forman annular air chamber, said inner wall havr ing openings between itsupper and lower edges m'hf gvgtfeens 'are f record m the for the passageof air from said chamber into the space inwardly of said inner wall,said top wall 5 UNTED STATES PATENTS having a portion extending inwardlytoward the Number axis of said burner beyond said inner wall and Y 2 116278, Moggi? al Maanas terminating in a depending annular flange with2165'212 Bauer 7' "Julyl' 1939 lits lower edge substantially in linewith the upper- 2183812 Horns Dec 19 1939. most edge portions of theopenings in said inner l0 2241470 Miner "May 13 1941 wall, saidcylindricalfside wall having primary'air 2259743 Flche; Oct 21' 1941inlet openings below and above said lower baille 2264'378 Hme De 2 1941and secondary air inlet openings to said chamber. 21302237 Behren'gt'l.Nov 17 1942 2,339,637 Hayter Jan. 18, 1944 HOWARD C- BAITY' 2,381,744Hayter i Aug. '1, 1945

